<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var str ="I have a dream"
        strarr = str.split(" ")
        for(var i in strarr){
            var word = strarr[i]
            word=word.split("")
            while(word[1]){
                word[1]=word[1].toUpperCase()
                word = word.toString().replaceAll(",","")
                strarr[i]=word
                console.log(word)

                break
            }
        
        }
        strarr = strarr.toString().replaceAll(","," ")
        console.log(strarr)
        
    </script>
</body>
</html>